Water disinfection strategies to improve Atlantic salmon parr production in freshwater recirculating aquaculture systems (RAS-Health) (39754)

Project Details


The primary objective of the Norwegian/Danish project RASHealth is to optimize existing disinfection protocols and develop new water disinfection strategies to control pathogens in Atlantic salmon freshwater (FW) RAS. The challenge is to increase treatment efficacy whilst simultaneously ensuring Atlantic salmon parr health and welfare and biofilter performance. Ozone and peracetic acid will be tested.

The experiments and analysis will take place in at Nofima in Tromsø, Norway, at NTNU Trondheim, Norway and at DTU Aqua, Hirtshals, Denmark.

RASHealth has a project structure divided into 4 work-packages:

1) Develop and use of new assays to quantify bacterial activity in biofilters (nitrification and heterotrophic activity); there is an urgent need for these tool and this will allow us to quantify effects of disinfection procedures in the water and also in the biofilm (DTU Aqua).
2) Investigate oxidative stress, welfare, growth and performance of atlantic salmon parr exposed to disinfection (Nofima).
3) Quantification of microbial community and presence of pathogens (NTNU).
4) Challenge experiments where pathogenic conditions and use of disinfectants will be tested be combining WP1,2,3.

The expected outcome of the project is to

- Evaluate the impact of two water disinfection strategies on biofilter performance, biofilm and water from FW-RAS.
- Develop and optimize an assay to quantify disinfection efficacy on biofilm activity.
- Assess the effect of PAA water disinfection on Atlantic salmon parr health, welfare and growth.
- Evaluate the infection contribution of two pathogen sources in RAS and the subsequent fish infection dynamics.
- Evaluate the efficiency of two disinfection strategies in controlling pathogen outbreaks and determine how routine   disinfection impact fish health and biofilter microbiota.
- Disseminate new knowledge on chemical water treatment to the aquaculture industry and scientific community.
- Communicate the project and the project outputs to the general public.

National Institute of Aqua Resources, DTU Aqua
The Norwegian Institute of Food, Fisheries and Aquaculture Research (NOFIMA), Norway (coordinator)
Norwegian University of Science and Technology (NTNU), Norway

The projects is funded by Norwegian FFH, Havbruk2 (Young Research Talents).

Research area: Aquaculture
Effective start/end date15/01/202015/12/2023


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